The H-Man (1958)

After a series of disappearances in Tokyo, it is discovered that a man-eating monster created by radiation is lurking in the city's sewers. The monster, known as the H-Man, melts its victims upon contact. As the police and scientists race against time to stop the H-Man, they uncover a criminal gang involved in illegal activities. With the city in danger, they must find a way to defeat the H-Man before it claims more lives.